临床MRI系统上的同步径向1H和23Na双核MRI,配备宽带传输通道

IF 0.9 4区 医学 Q4 CHEMISTRY, PHYSICAL Concepts in Magnetic Resonance Part B-Magnetic Resonance Engineering Pub Date : 2017-02-03 DOI:10.1002/cmr.b.21347
Joshua D. Kaggie, Nabraj Sapkota, Bijaya Thapa, Kyle Jeong, Xianfeng Shi, Glen Morrell, Neal K. Bangerter, Eun-Kee Jeong
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引用次数: 13

摘要

本工作的目的是在不修改临床硬件的情况下,在相同序列的3T临床MRI系统上同步获取质子(1H)和钠(23Na)图像数据,并演示通过笛卡尔和径向k空间采样与1H/23Na- gre成像同步获取。实现同步双核成像的方法是:对1H信号进行混频,使常规MRI系统在23Na频率下同时采集到23Na和1H信号;交错的1H/23Na传输脉冲在笛卡尔和径向序列;在1H信号上使用相位稳定来消除混频效应。同步1H/23Na装置获得图像所需的时间是使用给定设置和参数顺序获取相同1H和23Na图像所需时间的一半。在不增加1H采集时间的情况下,采用双核硬件和序列修改获取与1H图像相同序列的23Na图像。这项工作展示了一种可行的技术,可以在不增加1H采集时间的情况下获取23Na图像数据,使用少量额外的定制硬件,无需修改具有多核能力的商用扫描仪。
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Synchronous radial 1H and 23Na dual-nuclear MRI on a clinical MRI system, equipped with a broadband transmit channel

The purpose of this work was to synchronously acquire proton (1H) and sodium (23Na) image data on a 3T clinical MRI system within the same sequence, without internal modification of the clinical hardware, and to demonstrate synchronous acquisition with 1H/23Na-GRE imaging with Cartesian and radial k-space sampling. Synchronous dual-nuclear imaging was implemented by: mixing down the 1H signal so that both the 23Na and 1H signal were acquired at 23Na frequency by the conventional MRI system; interleaving 1H/23Na transmit pulses in both Cartesian and radial sequences; and using phase stabilization on the 1H signal to remove mixing effects. The synchronous 1H/23Na setup obtained images in half the time necessary to sequentially acquire the same 1H and 23Na images with the given setup and parameters. Dual-nuclear hardware and sequence modifications were used to acquire 23Na images within the same sequence as 1H images, without increases to the 1H acquisition time. This work demonstrates a viable technique to acquire 23Na image data without increasing 1H acquisition time using minor additional custom hardware, without requiring modification of a commercial scanner with multinuclear capability.

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来源期刊
CiteScore
2.60
自引率
0.00%
发文量
3
审稿时长
>12 weeks
期刊介绍: Concepts in Magnetic Resonance Part B brings together engineers and physicists involved in the design and development of hardware and software employed in magnetic resonance techniques. The journal welcomes contributions predominantly from the fields of magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), and electron paramagnetic resonance (EPR), but also encourages submissions relating to less common magnetic resonance imaging and analytical methods. Contributors come from both academia and industry, to report the latest advancements in the development of instrumentation and computer programming to underpin medical, non-medical, and analytical magnetic resonance techniques.
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